42570409 has 8 divisors (see below), whose sum is σ = 50221568. Its totient is φ = 35311680.

The previous prime is 42570403. The next prime is 42570419. The reversal of 42570409 is 90407524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42570409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42570403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97872 + ... + 98305.

It is an arithmetic number, because the mean of its divisors is an integer number (6277696).

Almost surely, 2^42570409 is an apocalyptic number.

It is an amenable number.

42570409 is a deficient number, since it is larger than the sum of its proper divisors (7651159).

42570409 is a wasteful number, since it uses less digits than its factorization.

42570409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196215.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 42570409 is about 6524.6002942709. The cubic root of 42570409 is about 349.1692104806.

The spelling of 42570409 in words is "forty-two million, five hundred seventy thousand, four hundred nine".